CN111624718A - Phase-stabilized optical cable - Google Patents
Phase-stabilized optical cable Download PDFInfo
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- CN111624718A CN111624718A CN202010511280.8A CN202010511280A CN111624718A CN 111624718 A CN111624718 A CN 111624718A CN 202010511280 A CN202010511280 A CN 202010511280A CN 111624718 A CN111624718 A CN 111624718A
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- layer
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- optical cable
- cable
- coating layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
A phase-stabilized optical cable comprises a plurality of cable cores, a reinforcing layer and an outer protective layer which are arranged from inside to outside, wherein each cable core comprises an optical fiber, a coating layer and a tight-wrapping layer, the coating layer is wrapped on the surface of the optical fiber, and the tight-wrapping layer is wrapped outside the coating layer. According to the phase-stabilized optical cable, the coating layer is coated outside the optical fiber, the tight coating layer is arranged outside the coating layer, stable transmission performance is guaranteed in a higher temperature range, time delay generated by optical fiber transmission signals when the environmental temperature of the optical fiber is changed can be effectively reduced, and the double-sheath design is structurally adopted, so that the phase-stabilized optical cable has excellent tensile strength, lateral pressure resistance and repeated bending resistance, and is suitable for extreme application scenes.
Description
Technical Field
The application relates to the field of cables, in particular to a phase-stabilized optical cable.
Background
In the conventional optical fiber cable product, the optical path difference can change along with the temperature change and can be transmitted at a certain distanceIn the process, the signal transmission distance can have certain drift due to the change of the temperature of the transmission path, which affects the phase stability of the output signal, and the change process is mainly caused by the change of the refractive index of the fiber core, because the main material of the optical fiber is quartz, and the thermal expansion coefficient is 10-7On the order of magnitude, whereas conventional optical fiber outer layer upjacket materials have a coefficient of thermal expansion of 10-5About the order of magnitude, this kind of thermal expansion coefficient's nonconformity can lead to the optical fiber to take place the microbend when the temperature difference changes greatly for the phase place changes when the optical transmission signal arrives the receiving terminal at the appointed moment, influences the transmission performance of optic fibre, and the tensile of conventional optical fiber cable product, anti side pressure performance and temperature resistance can't satisfy extreme environment's user demand moreover.
Disclosure of Invention
In view of the above, there is a need for a phase-stable optical cable having excellent mechanical and environmental properties and stable transmission signal without time delay.
The embodiment of the application provides a phase-stabilized optical cable includes a plurality of cable cores, enhancement layer and outer jacket that set up from inside to outside, each the cable core includes optic fibre, coating and tight covering layer, the coating cladding in the optic fibre surface, tight covering layer cladding in outside the coating.
Further, in some embodiments of the present application, the phase-stabilized optical cable further includes an armor layer disposed between the upjacket layer and the reinforcement layer.
Further, in some embodiments of the present application, the material of the armor comprises a flexible metal hose armor, and the armor has an armor wall thickness of 0.2mm to 0.4 mm.
Further, in some embodiments of the present application, the material of the reinforcement layer includes aramid fiber and glass fiber, and the aramid fiber and the glass fiber are wrapped around the outer circumference of the armor layer by unidirectional twisting.
Further, in some embodiments of the present application, the material of the reinforcement layer further includes a fiber woven layer and a metal woven layer, the fiber woven layer or the metal woven layer is wrapped on the outer periphery of the armor layer, the fiber woven layer includes aramid fiber woven and glass fiber woven, and the metal woven layer includes copper wire woven and steel wire woven.
Further, in some embodiments of the present application, the material of the outer sheath comprises one of a polyperfluorinated ethylene propylene resin, an ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and a thermoplastic elastomer material.
Further, in some embodiments of the present application, the diameter of the coating layer is 245 μm to 255 μm, the coating layer is formed of a uv-curable high-temperature resistant acrylic resin or polyimide resin, and the overcladding layer is made of a liquid crystal polymer material.
Further, in some embodiments of the present application, the number of the cable cores is at least two, and a plurality of the cable cores are unidirectionally twisted or straightly laid.
Further, in some embodiments of the present application, the fiber attenuation satisfies 1310nm ≦ 0.45dB/km, 1550nm ≦ 0.40dB/km, and a temperature drift coefficient between 3ps/km × k and 15ps/km × k.
Further, in some embodiments of the present application, a water blocking yarn is further disposed in the phase-stabilized optical cable, and the water blocking yarn is stranded on the cable core.
According to the phase-stabilized optical cable, the coating layer is coated outside the optical fiber, the tight coating layer is arranged outside the coating layer, stable transmission performance is guaranteed in a higher temperature range, and the double-sheath design is structurally adopted, so that the phase-stabilized optical cable has excellent tensile strength, side pressure resistance and repeated bending resistance, and is suitable for extreme scenes.
Drawings
Fig. 1 is a schematic cross-sectional view of a phase-stable optical cable according to an embodiment of the present application.
Fig. 2 is a schematic cross-sectional view of a cable core according to an embodiment of the present application.
Fig. 3 is a schematic cross-sectional view of a phase-stable fiber optic cable according to another embodiment of the present application.
Description of the main elements
| Phase-stabilized |
100 |
| |
10 |
| |
11 |
| |
12 |
| |
13 |
| Water- |
14 |
| |
20 |
| |
30 |
| Outer |
40 |
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides a phase-stabilized optical cable includes a plurality of cable cores, enhancement layer and outer jacket that set up from inside to outside, each the cable core includes optic fibre, coating and tight covering layer, the coating cladding in the optic fibre surface, tight covering layer cladding in outside the coating.
According to the phase-stabilized optical cable, the coating layer is coated outside the optical fiber, the tight coating layer is arranged outside the coating layer, stable transmission performance is guaranteed in a higher temperature range, time delay generated by optical fiber transmission signals when the environmental temperature of the optical fiber is changed can be effectively reduced, and the double-sheath design is structurally adopted, so that the phase-stabilized optical cable has excellent tensile strength, lateral pressure resistance and repeated bending resistance, and is suitable for extreme scenes.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, in an embodiment, a phase-stabilized optical cable 100 shown in fig. 1 is used for transmitting signals and applied to the fields of phased array radar, deep space exploration, signal simulation, and the like. The phase-stabilized optical cable 100 comprises a plurality of cable cores 10, an armor layer 20 covering the cable cores 10 from inside to outside, a reinforcing layer 30 and an outer protective layer 40.
Referring to fig. 2, the cable core 10 includes an optical fiber 11, a coating layer 12 and a tight-buffered layer 13. In an embodiment, the number of the cable core 10 is at least two, and a plurality of the cable cores 10 are unidirectionally twisted or straightly laid. In one embodiment, the diameter of the coating layer 12 is 245 μm to 255 μm, and the coating layer 12 is formed by using ultraviolet-cured high-temperature-resistant acrylic resin, and is used for improving the temperature resistance of the optical fiber 11 so that the temperature resistance level thereof meets the range of-55 ℃ to 150 ℃. In another embodiment, the coating layer 12 may also use polyimide resin. The color of the coating layer 12 can be selected according to the requirement, such as white, other colors, and the like. In one embodiment, the optical fiber 11 is a single mode optical fiber, such as g.652, g.655, g.657, etc. In one embodiment, the tight cladding layer 13 is made of a Liquid Crystal Polymer (LCP) material, which is a thermotropic liquid crystal polymer that can be processed in a molten state, so that the delay of an optical transmission signal can be greatly reduced, and stable signal transmission can be realized. In one embodiment, a liquid crystal polymer material modified with glass fibers, or other polymers of resins and liquid crystal polymers, are added to improve the dimensional stability and strength of the molded article. In an embodiment, the size of the cable core 10 is 0.4mm to 0.8mm, and the number of the cable cores 10 may be set according to requirements, and may be 1, 2, 3, and the like.
In one embodiment, the method of extruding the tight cladding layer 13 includes preheating the optical fiber, drawing the optical fiber to the center of a core of an extruder, coating the molten LCP material on the surface of the optical fiber 11 under an extrusion pressure, and water-cooling the molten LCP material to form the tight cladding layer 13 on the surface of the optical fiber. Before use, the LCP material is dried in a drying oven for at least 4 hours at 120-160 ℃; adopting a high-temperature plastic extruding machine, wherein the diameter of an extruding screw is 25mm, and the length-diameter ratio is 25: 1; the extrusion temperature is 250-320 ℃; adopting an extrusion forming mode, wherein the production speed is 100-200 m/min; actively paying off the optical fiber, wherein the preheating temperature of the optical fiber is 70-150 ℃; adopting a water cooling mode, wherein the cooling temperature is 15-55 ℃.
It can be understood that the cable core 10 is further provided with a water blocking yarn 14, and the water blocking yarn 14 is twisted on the cable core 10 to increase the water blocking performance of the cable core 10. In one embodiment, the water-blocking yarn can be replaced by water-blocking powder of super absorbent resin, and can also be replaced by water-blocking aramid fiber yarn.
In one embodiment, the armor layer 20 is armored by a flexible metal hose, and the armor wall thickness of the armor layer 20 is 0.2mm to 0.4 mm.
In one embodiment, the material used for the reinforcement layer 30 includes aramid fiber and glass fiber, and is wrapped around the armor layer 20 by unidirectional twisting, the twisting pitch is 300mm to 800mm, such as 400mm, 500mm, 600mm, etc., wherein the aramid fiber has a specification of 200 denier to 1000 denier, and the number of the aramid fiber is 2 to 8. The coating thickness of the reinforcing layer 30 is 0.1 mm-0.2 mm. In another embodiment, the reinforcement layer 30 is coated with a woven fiber layer or a woven metal layer, wherein the woven fiber layer includes a woven aramid fiber layer and a woven glass fiber layer; the metal braided layer comprises copper wire braiding and steel wire braiding; the thickness of the weaving layer is 0.1 mm-0.3 mm;
it is understood that the number of the reinforcing layers 30 is not limited to the above limitation, and can be adjusted according to the specific stretching requirement, and the structure of the reinforcing layers 30 arranged on the armor 20 can be ensured to be round during the twisting or cladding process.
In one embodiment, the material of the outer sheath 40 includes fluorinated ethylene propylene resin, and the outer sheath 40 is uniformly coated on the surface of the reinforcement layer 30 by extrusion molding, and the wall thickness of the outer sheath 40 is 0.4mm to 1.0 mm. In another embodiment, the material of the outer sheath 40 may also include other types of fluoroplastics, such as ethylene-tetrafluoroethylene copolymer (ETFE), Polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkylvinylether copolymer (PFA). In another embodiment, the material of the outer sheath 40 further comprises a thermoplastic elastomer material, such as thermoplastic vulcanizate (TPV), thermoplastic polyurethane elastomer rubber (TPU), thermoplastic polyester elastomer (TPEE).
As shown in fig. 1, in an embodiment, the number of the cores 10 of the phase-stabilized optical cable 100 is two, where the phase-stabilized optical cable 100 includes the cores 10, an armor layer 20 covering the cores 10 from inside to outside, a reinforcing layer 30, and an outer sheath 40, and an overall outer diameter of the phase-stabilized optical cable 100 is 3.0mm to 5.0 mm. The phase-stabilized optical cable 100 has excellent temperature resistance and lower temperature drift coefficient within the range of-55 ℃ to 150 ℃, and meets the requirements that the optical fiber attenuation is 1310nm or less than 0.45dB/km, 1550nm or less than 0.40dB/km, and the temperature drift coefficient is 3ps/(km x k) -15 ps/(km x k). The phase-stabilized optical cable 100 has high tensile strength, lateral pressure resistance, repeated bending resistance, aging resistance and corrosion resistance, and the flame retardant grade can meet UL 94V-0.
It can be understood that when the requirement for the armor layer 20 is low, the armor layer 20 may be removed, as shown in fig. 3, in an embodiment, the phase-stabilized optical cable 100 includes the cable core 10, the reinforcement layer 30 covering the cable core 10 from inside to outside, and the outer protective layer 40, the overall outer diameter of the phase-stabilized optical cable 100 is 1.8mm to 3.0mm, the phase-stabilized optical cable 100 has excellent temperature resistance and a low temperature drift coefficient in a range of-55 ℃ to 150 ℃, and satisfies that the optical fiber attenuation is 1310nm or less than 0.45dB/km, 1550nm or less than 0.40dB/km, and the temperature drift coefficient is 3ps/(km × k) -15 ps/(km × k). The phase-stabilized optical cable 100 has high tensile strength, lateral pressure resistance, aging resistance and corrosion resistance, and the flame retardant rating can meet UL 94V-0.
It can be understood that the cable core 10 can be used as a single optical cable, as shown in fig. 2, the overall size of the phase-stable optical cable is 0.4mm to 0.8 mm; within the range of-55 ℃ to 150 ℃, the single-core optical cable has excellent temperature resistance and lower temperature drift coefficient, and meets the requirements that the optical fiber attenuation is 1310nm or less than 0.45dB/km, 1550nm or less than 0.40dB/km, and the temperature drift coefficient is 3ps/(km x k) -15 ps/(km x k). The flame retardant rating meets UL 94V-0.
The phase-stabilizing optical cable is characterized in that the optical fiber is coated with the coating layer, the coating layer is made of special high-temperature-resistant resin materials, stable transmission performance is guaranteed in a higher temperature range, the tight coating layer is made of LCP materials, time delay generated by optical fiber transmission signals when the environmental temperature of the optical fiber changes can be effectively reduced, and a double-sheath armored design is structurally adopted, so that the phase-stabilizing optical cable has excellent tensile strength, side pressure resistance and repeated bending resistance, is suitable for extreme scenes, has a lower temperature drift coefficient in a wider temperature range, reduces transmission time delay and realizes stable phase transmission of the optical signals.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications of the above embodiments are within the scope of the disclosure claimed in the present application as long as they are within the spirit and scope of the present application.
Claims (10)
1. A phase-stabilized optical cable is characterized in that: the optical fiber cable comprises a plurality of cable cores, a reinforcing layer and an outer protective layer which are arranged from inside to outside, wherein each cable core comprises an optical fiber, a coating layer and a tight coating layer, the coating layer is coated on the surface of the optical fiber, and the tight coating layer is coated outside the coating layer.
2. The phase-stable optical cable of claim 1, wherein: the phase-stabilized optical cable further comprises an armor layer, and the armor layer is arranged between the tight wrapping layer and the reinforcing layer.
3. The phase-stable optical cable of claim 2, wherein: the armor layer is made of flexible metal hose armor, and the thickness of the armor wall of the armor layer is 0.2-0.4 mm.
4. The phase-stable optical cable of claim 2, wherein: the material of the reinforcing layer comprises aramid fiber and glass fiber, and the aramid fiber and the glass fiber are wrapped on the periphery of the armor layer in a unidirectional stranding mode.
5. The phase-stable optical cable of claim 2, wherein: the material of enhancement layer still includes fibre weaving layer and metal braid, fibre weaving layer or metal braid cladding in the periphery of armor, the fibre weaving layer includes that aramid fiber weaves and glass fiber weaves, the metal braid includes that the copper wire weaves and the steel wire weaves.
6. A phase-stable optical cable as claimed in claim 3, wherein: the outer protective layer is made of one of fluorinated ethylene propylene resin, ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer and thermoplastic elastomer material.
7. The phase-stable optical cable of claim 1, wherein: the diameter of the coating layer is 245-255 mu m, the coating layer is formed by ultraviolet-cured high-temperature-resistant acrylic resin or polyimide resin, and the tightly-packed layer is made of a liquid crystal polymer material.
8. The phase-stable optical cable of claim 1, wherein: the number of the cable cores is at least two, and a plurality of cable cores are arranged in a single-way twisted or straight mode.
9. The phase-stable optical cable of claim 1, wherein: the optical fiber attenuation meets the requirements that 1310nm is less than or equal to 0.45dB/km, 1550nm is less than or equal to 0.40dB/km, and the temperature drift coefficient is between 3ps/km x k and 15ps/km x k.
10. The phase-stable optical cable of claim 1, wherein: the phase-stabilizing optical cable further comprises water-blocking yarns, and the water-blocking yarns are twisted on the cable core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511280.8A CN111624718A (en) | 2020-06-08 | 2020-06-08 | Phase-stabilized optical cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511280.8A CN111624718A (en) | 2020-06-08 | 2020-06-08 | Phase-stabilized optical cable |
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| CN111624718A true CN111624718A (en) | 2020-09-04 |
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| CN202010511280.8A Pending CN111624718A (en) | 2020-06-08 | 2020-06-08 | Phase-stabilized optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643849A (en) * | 2021-08-11 | 2021-11-12 | 江苏中天科技股份有限公司 | Mooring photoelectric hybrid cable |
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| CN103226225A (en) * | 2013-04-28 | 2013-07-31 | 江苏七宝光电集团有限公司 | High-temperature tightly packaged optical fiber |
| CN103257422A (en) * | 2013-05-20 | 2013-08-21 | 江苏南方通信科技有限公司 | Novel guide optical fiber |
| CN103513375A (en) * | 2012-06-22 | 2014-01-15 | 住友电气工业株式会社 | Coated optical fiber |
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| CN110878171A (en) * | 2019-08-14 | 2020-03-13 | 东莞拓步特高分子材料有限公司 | Liquid crystal polymer LCP |
-
2020
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|---|---|---|---|---|
| US4923278A (en) * | 1983-10-21 | 1990-05-08 | British Telecommunications Public Limited Company | Temperature desensitization of delay in optical fibres |
| CN1279773A (en) * | 1997-09-29 | 2001-01-10 | 西门子公司 | Optical cable |
| JP2006209139A (en) * | 2006-02-15 | 2006-08-10 | Kuraray Co Ltd | Manufacturing method of optical fiber |
| CN101592765A (en) * | 2008-05-28 | 2009-12-02 | 古河电子北美公司 | The leading in cable to bend-insensitive of indoor use |
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| CN113643849A (en) * | 2021-08-11 | 2021-11-12 | 江苏中天科技股份有限公司 | Mooring photoelectric hybrid cable |
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